class_docstr: CALIOP v3 HDF4 reader.
class_docstr_tok: ["CALIOP","v3","HDF4","reader","."]
docstr: Grab end time with regular expression.
docstr_tok: ["Grab","end","time","with","regular","expression","."]
code: def parse_metadata_string(metadata_string):
      """Grab end time with regular expression."""
      regex = r"STOP_DATE.+?VALUE\s*=\s*\"(.+?)\""
      match = re.search(regex, metadata_string, re.DOTALL)
      end_time_str = match.group(1)
      return end_time_str
  
file_path: satpy/satpy/readers/caliop_l2_cloud.py
imports: import logging
  import os.path
  import re
  from datetime import datetime
  from pyhdf.SD import SD, SDC
  from satpy.dataset import Dataset
  from satpy.readers.file_handlers import BaseFileHandler
label_desc: Use image node_id 3 for calling the HDF4BandReader obj's underlying member method code with example usage: obj.parse_metadata_string(metadata_string) and returns: end_time_str